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Stretch-induced bending of soft ribbed strips

Abstract : We show that ribbed elastic strips under tension present large spontaneous curvature and may close into tubes. In this single material architectured system, transverse bending results from a bilayer effect induced by Poisson contraction as the textured ribbon is stretched. Surprisingly, the induced curvature may reverse if ribs of different orientations are considered. Slender ribbed structures may also undergo a non-trivial buckling transition. We use analytical calculations to describe the evolution of the morphology of the ribbon and the transitions between the different experimental regimes as a function of material properties, geometrical parameters and stretching strain. This scale-independent phenomenon may help the manufacturing of tubular textured structures or easily controllable grippers at small scale.
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Submitted on : Monday, October 25, 2021 - 4:20:53 PM
Last modification on : Friday, December 3, 2021 - 11:42:31 AM

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Emmanuel Siéfert, Nicolas Cattaud, Etienne Reyssat, Benoît Roman, José Bico. Stretch-induced bending of soft ribbed strips. Physical Review Letters, American Physical Society, 2021, 127 (16), ⟨10.1103/PhysRevLett.127.168002⟩. ⟨hal-03402445⟩

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